Cooling fan for motors



Aug-'12 192.4. I 1,504,651

7 H. M. STUELAND COOLING FAN FUR MOTORS Filed Aug. 10 192] 2 Shoots-Sheet 1 Filed Aug. 10. 1921 2 Shoots-Shoot 2 g'nmentoi Patented Au 12, 1924.

UNITED STATES HAROLD M. STUELAND, OF CLARKFIELD, MINNESOTA.

COOLING ran roa morons.

Application filed August 10, 1921. Serial No. 491,118.

To all whom it may concern:

Be it known that I, HAROLD M. STUELAND, a citizen of theUnited States, residing at Clarkfield, in the county of Yellow Medicine and State of Minnesota, have invented certain new and useful Improvements in Cooling Fans for Motors, of which the following is a specification.

This invention relates to cooling fans for motors and more particularly to an apparatus adapted to be operated for adjustingor reversing the blades on the fan which are em loyed for cooling the motor.

- ther objects of the invention will appear upon consideration of the following detail description and accompanying drawings,

wherem:

Figure 1 is a plan view, I

Figure 2 is a cross section taken on the line 22 of Fig. 1,

Figure 3 is a side elevation partly in section, I

Figure 4 is a cross section through the sliding block, and

Figure 5 is a perspective view of one of the fan blades.

Referring to the drawing by numerals, the shaft 1 is square in cross section'and is equipped with a sliding block 2 which consists of a square member having a square central openlng 3 through which the shaft 1 extends. At opposite faces, the block is provided with screw threaded recesses 4, a stud 5 extending centrally through circular movable disks 6 on the faces of the said sliding block and are engaged with the fan blades 7 as shown. Each fan blade 7 comprises a metallic blade of suitable length having a cut out portion 8 and provided with transverse slits for the purpose of per- -mitting the material at the center of the blade to be pressed outwardly in opposite directions to form a series of holding elements for the extended end of the stud 5, thus securing the fan blades to .the member 5. The fan blades are also attached to the movable disks 6- by the lugs orears 9 on the ends of the blades which are provided with suitable fastening members for securing the blades in position. By this arrangement it will be noted that the disks 6 may be turned to (gauge the angle of the fan blades onv the stu 5.

At one end of the shaft 1 is a square block 10 which is fixed to the shaft and has at carried by the disks 6 so that when the block is longitudinally moved on the shaft 1, the arms 11 engaging the members 12 will cause the disks to turn, thus turning the fan blades to change the angle of the same. A coil spring 13 is interposed between the member 10 and the block 2 to normally urge the block to a position away from the block 10.

The usual belt pulley 14 is mounted upon the shaft whereby the shaft may be rotated, and one end of the block 2 is provided with a collar or sleeve 15 having diametrically opposite pins 16 which are connected to the fork ends 17 of an operating lever 18 which is pivotally mounted upon a bracket 19 as shown in Fig. 1. This lever is connected by an operating rod 20 which extends to a point within reach of the driver of the vehiclye whereby the apparatus may be operate Minor changes may be made in the details of construction without departing from the spirit of the invention or the scope of the claims hereunto appended.

What is claimed is 1. An adjustable fan for motors comprising a rotating shaft, a block secured stationary to one end of said shaft, a fan hub slid ably mounted on the shaft. a coil spring urging said fan hub from said block, a pluralitv of studs fastened into the said hub, fan blades mounted on said studs, movable plates between the fan hub and fan blades, means for securing the blades to the plates, arms connecting the said plates to said block, and means for sliding said fan hub upon the 2. In combination a rotating shaft, a block secured to one end of the shaft, a hub slidably mounted on the shaft, a plurality of fan blades rotatably connected to the said hub, plates on said hub for rotating the said fan blades, a plurality of arms connecting the plates with the block, a coil spring between said block and fan hub, a rotatable collar carried by said hub, pins extending from the collar, a forked member engaging said pins, means for supporting the forked member, and means for actuating same to move said hub upon said shaft to change the angle of the blades.

3. A device of the character described comprising a rotating shaft, a hub slidably mounted on the shaft, a plurality of studs threaded into the hub, fan blades mounted on the studs by having slits formedtherein 5 and the portions between said slits bentin opposite directions so as to'form aligning openings for receiving said studs, plates on said hub having extending arms secured to the fan blades, means for. sliding the hub 1 upon the rotating shaft, a coil spring acting against sliding movement of the hub, a block rigidly secured to the shaft, and arms connecting the said block and the movable plates.

In testimon whereof, I have afiixed my 15 signature in t e presence of two witnesses:

HAROLD M. STUELAND.

Witnesses:

H. H. -GALBRAITH,

RALPH Nnss. 

